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1. The day was not clear enough for us to take any pictures.

2. The price is not cheap enough for me to buy. 

3. The Daigon river is not deep enough to be for navigation.

4. This mountain is not low enough for us to climb.

5. The Red River is not narrow enough for us to swim across.

6. This book is not easy enough for the weak students to read.

1. It was too hazy a day for us to take any pictures

The day was not clear enough for us to take any pictures.

2. The price is too high for me to buy it

The price is not cheap enough for me to buy. 

3. The Saigon river is too shallow to be for navigation

The Saigon river is not deep enough to be for navigation.

4. This mountain is to steep for us to climb

This mountain is not easy for us to climb.

5. The Red River is too wide for us to swim across

The Red River is not narrow enough for us to swim across.

6. This book is too difficult for the weak students to read

This book is not easy enough for the weak students to read.